#include "unp.h"

int udp_client(const char *host,const char *serv,SA **saptr,socklen_t *lenp)
{
	int	sockfd,n;
	struct	addrinfo hints,*res,*ressave;

	bzero(&hints,sizeof(struct addrinfo));
	hints.ai_family = AF_UNSPEC;
	hints.ai_socktype = SOCK_DGRAM;

	if( ( n = getaddrinfo(host,serv,&hints,&res)) != 0)
		err_quit("udp_client error for %s %s : %s\n",host,serv,gai_strerror(n));

	ressave = res;
	
	do{
		sockfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol);
		if( sockfd >= 0)
			break;
	}while( (res = res->ai_next) != NULL);

	if( res == NULL )
		err_sys("udp_client error for %s,%s\n",host,serv);

	*saptr = Malloc(res->ai_addrlen);
	memcpy(*saptr, res->ai_addr, res->ai_addrlen);
	*lenp = res->ai_addrlen;

	freeaddrinfo(ressave);

	return (sockfd);
}
